Membership

In today’s market, it is imperative to be knowledgeable and have an edge over the competition. ACI members have it…they are engaged, informed, and stay up to date by taking advantage of benefits that ACI membership provides them.

ACI MEMBERSHIP

The American Concrete Institute

Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.

ABOUT THE INTERNATIONAL CONCRETE ABSTRACTS PORTAL

The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.

Abstract:Recently, concrete workability has become regarded as much more important because of large demands for high -strength concrete with high unit powder content and unstable quality of concrete materials. The new hyper-branched
polymer was developed to provide better workability with much lower plastic
viscosity of the mortar than the conventional polycarboxylate type superplasticizers. In this study, further workability improvement for a longer periods was investigated to provide better workability to the construction job site. The higher density of ethylene oxide (EO) chains adsorbed on cement surfaces was found to provide a more stable dispersion state that leads to lower viscosity of the dispersion system. However, the cement dispersion states might change with time generally due to the cement hydration process, so that the viscosity of the mortar or the concrete tends to become
higher although the fluidity is maintainable. Thus, new additional EO chains were thought to be required with time on the hydrated cement surfaces to maintain a stable dispersion state. Based on this hypothesis, theoretically required EO chains were calculated and it was possible to maintain the mortar viscosity utilizing new hyper-branched polymer and hydrolysis type polymer.